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| "use strict";
var Exception = require("../exception")["default"];
function stripFlags(open, close) {
return {
left: open.charAt(2) === '~',
right: close.charAt(close.length-3) === '~'
};
}
exports.stripFlags = stripFlags;
function prepareBlock(mustache, program, inverseAndProgram, close, inverted, locInfo) {
/*jshint -W040 */
if (mustache.sexpr.id.original !== close.path.original) {
throw new Exception(mustache.sexpr.id.original + ' doesn\'t match ' + close.path.original, mustache);
}
var inverse = inverseAndProgram && inverseAndProgram.program;
var strip = {
left: mustache.strip.left,
right: close.strip.right,
// Determine the standalone candiacy. Basically flag our content as being possibly standalone
// so our parent can determine if we actually are standalone
openStandalone: isNextWhitespace(program.statements),
closeStandalone: isPrevWhitespace((inverse || program).statements)
};
if (mustache.strip.right) {
omitRight(program.statements, null, true);
}
if (inverse) {
var inverseStrip = inverseAndProgram.strip;
if (inverseStrip.left) {
omitLeft(program.statements, null, true);
}
if (inverseStrip.right) {
omitRight(inverse.statements, null, true);
}
if (close.strip.left) {
omitLeft(inverse.statements, null, true);
}
// Find standalone else statments
if (isPrevWhitespace(program.statements)
&& isNextWhitespace(inverse.statements)) {
omitLeft(program.statements);
omitRight(inverse.statements);
}
} else {
if (close.strip.left) {
omitLeft(program.statements, null, true);
}
}
if (inverted) {
return new this.BlockNode(mustache, inverse, program, strip, locInfo);
} else {
return new this.BlockNode(mustache, program, inverse, strip, locInfo);
}
}
exports.prepareBlock = prepareBlock;
function prepareProgram(statements, isRoot) {
for (var i = 0, l = statements.length; i < l; i++) {
var current = statements[i],
strip = current.strip;
if (!strip) {
continue;
}
var _isPrevWhitespace = isPrevWhitespace(statements, i, isRoot, current.type === 'partial'),
_isNextWhitespace = isNextWhitespace(statements, i, isRoot),
openStandalone = strip.openStandalone && _isPrevWhitespace,
closeStandalone = strip.closeStandalone && _isNextWhitespace,
inlineStandalone = strip.inlineStandalone && _isPrevWhitespace && _isNextWhitespace;
if (strip.right) {
omitRight(statements, i, true);
}
if (strip.left) {
omitLeft(statements, i, true);
}
if (inlineStandalone) {
omitRight(statements, i);
if (omitLeft(statements, i)) {
// If we are on a standalone node, save the indent info for partials
if (current.type === 'partial') {
current.indent = (/([ \t]+$)/).exec(statements[i-1].original) ? RegExp.$1 : '';
}
}
}
if (openStandalone) {
omitRight((current.program || current.inverse).statements);
// Strip out the previous content node if it's whitespace only
omitLeft(statements, i);
}
if (closeStandalone) {
// Always strip the next node
omitRight(statements, i);
omitLeft((current.inverse || current.program).statements);
}
}
return statements;
}
exports.prepareProgram = prepareProgram;function isPrevWhitespace(statements, i, isRoot) {
if (i === undefined) {
i = statements.length;
}
// Nodes that end with newlines are considered whitespace (but are special
// cased for strip operations)
var prev = statements[i-1],
sibling = statements[i-2];
if (!prev) {
return isRoot;
}
if (prev.type === 'content') {
return (sibling || !isRoot ? (/\r?\n\s*?$/) : (/(^|\r?\n)\s*?$/)).test(prev.original);
}
}
function isNextWhitespace(statements, i, isRoot) {
if (i === undefined) {
i = -1;
}
var next = statements[i+1],
sibling = statements[i+2];
if (!next) {
return isRoot;
}
if (next.type === 'content') {
return (sibling || !isRoot ? (/^\s*?\r?\n/) : (/^\s*?(\r?\n|$)/)).test(next.original);
}
}
// Marks the node to the right of the position as omitted.
// I.e. {{foo}}' ' will mark the ' ' node as omitted.
//
// If i is undefined, then the first child will be marked as such.
//
// If mulitple is truthy then all whitespace will be stripped out until non-whitespace
// content is met.
function omitRight(statements, i, multiple) {
var current = statements[i == null ? 0 : i + 1];
if (!current || current.type !== 'content' || (!multiple && current.rightStripped)) {
return;
}
var original = current.string;
current.string = current.string.replace(multiple ? (/^\s+/) : (/^[ \t]*\r?\n?/), '');
current.rightStripped = current.string !== original;
}
// Marks the node to the left of the position as omitted.
// I.e. ' '{{foo}} will mark the ' ' node as omitted.
//
// If i is undefined then the last child will be marked as such.
//
// If mulitple is truthy then all whitespace will be stripped out until non-whitespace
// content is met.
function omitLeft(statements, i, multiple) {
var current = statements[i == null ? statements.length - 1 : i - 1];
if (!current || current.type !== 'content' || (!multiple && current.leftStripped)) {
return;
}
// We omit the last node if it's whitespace only and not preceeded by a non-content node.
var original = current.string;
current.string = current.string.replace(multiple ? (/\s+$/) : (/[ \t]+$/), '');
current.leftStripped = current.string !== original;
return current.leftStripped;
} |